アンドロイドスタジオ - onclickのボタンフラグメントERRORで

Question

SecondFragment.java

package com.hci.acer.heroesunite; 

import android.app.Fragment; 
import android.content.Intent; 
import android.os.Bundle; 
import android.support.annotation.Nullable; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.Button; 
import android.widget.EditText; 


public class SecondFragment extends Fragment { 



@Nullable 
@Override 
public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) { 
    View view = inflater.inflate(R.layout.trivia, container, false); 
    Button button = (Button) view.findViewById(R.id.button1); 
    button.setOnClickListener(new View.OnClickListener() { 
     @Override 
     public void onClick(View view) { 
      Intent i; 
      i = new Intent(SecondFragment.this, jrizal_trivia.class); 
      startActivity(i); 
     } 
    }); 
    return view; 


} 



} 

jrizal_trivia.java

package com.hci.acer.heroesunite; 

import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 

public class jrizal_trivia extends AppCompatActivity { 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_jrizal_trivia); 
} 
} 

MainActivity.java

package com.hci.acer.heroesunite; 

import android.content.Intent; 
import android.os.Bundle; 
import android.support.design.widget.FloatingActionButton; 
import android.support.design.widget.Snackbar; 
import android.support.v4.app.FragmentManager; 
import android.view.View; 
import android.support.design.widget.NavigationView; 
import android.support.v4.view.GravityCompat; 
import android.support.v4.widget.DrawerLayout; 
import android.support.v7.app.ActionBarDrawerToggle; 
import android.support.v7.app.AppCompatActivity; 
import android.support.v7.widget.Toolbar; 
import android.view.Menu; 
import android.view.MenuItem; 

public class MainActivity extends AppCompatActivity 
    implements NavigationView.OnNavigationItemSelectedListener { 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); 
    setSupportActionBar(toolbar); 


    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); 
    ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(
      this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close); 
    drawer.setDrawerListener(toggle); 
    toggle.syncState(); 

    NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view); 
    navigationView.setNavigationItemSelectedListener(this); 
} 

@Override 
public void onBackPressed() { 
    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); 
    if (drawer.isDrawerOpen(GravityCompat.START)) { 
     drawer.closeDrawer(GravityCompat.START); 
    } else { 
     super.onBackPressed(); 
    } 
} 

@Override 
public boolean onCreateOptionsMenu(Menu menu) { 
    // Inflate the menu; this adds items to the action bar if it is present. 
    getMenuInflater().inflate(R.menu.main, menu); 
    return true; 
} 

@Override 
public boolean onOptionsItemSelected(MenuItem item) { 
    // Handle action bar item clicks here. The action bar will 
    // automatically handle clicks on the Home/Up button, so long 
    // as you specify a parent activity in AndroidManifest.xml. 
    int id = item.getItemId(); 

    //noinspection SimplifiableIfStatement 
    if (id == R.id.action_settings) { 
     return true; 
    } 

    return super.onOptionsItemSelected(item); 
} 

@SuppressWarnings("StatementWithEmptyBody") 
@Override 
public boolean onNavigationItemSelected(MenuItem item) { 
    // Handle navigation view item clicks here. 
    int id = item.getItemId(); 
    android.app.FragmentManager fragmentManager = getFragmentManager(); 
    if (id == R.id.nav_home) { 
     fragmentManager.beginTransaction() 
       .replace(R.id.content_frame 
         ,new FirstFragment()) 
       .commit(); 
    } else if (id == R.id.nav_dyk) { 
     fragmentManager.beginTransaction() 
       .replace(R.id.content_frame 
         ,new SecondFragment()) 
       .commit(); 
    } else if (id == R.id.nav_about) { 
     fragmentManager.beginTransaction() 
       .replace(R.id.content_frame 
         ,new ThirdFragment()) 
       .commit(); 
    } else if (id == R.id.nav_hero1) { 
     startActivity(new Intent(this, jose_rizal.class)); 
    } else if (id == R.id.nav_hero2) { 
     startActivity(new Intent(this, andres_bonifacio.class)); 
    } else if (id == R.id.nav_hero3) { 
     startActivity(new Intent(this, emilio_aguinaldo.class)); 
    } else if (id == R.id.nav_hero4) { 
     startActivity(new Intent(this, apolinario_mabini.class)); 
    } else if (id == R.id.nav_hero5) { 

    } else if (id == R.id.nav_hero6) { 
     startActivity(new Intent(this, juan_luna.class)); 
    } else if (id == R.id.nav_hero7) { 

    } else if (id == R.id.nav_hero8) { 
    } 

    DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout); 
    drawer.closeDrawer(GravityCompat.START); 
    return true; 
} 
} 

そして、これはエラー

です

Error:(28, 31) error: no suitable constructor found for Intent(,Class) constructor Intent.Intent(String,Uri) is not applicable (argument mismatch; cannot be converted to String) constructor Intent.Intent(Context,Class) is not applicable (argument mismatch; cannot be converted to Context)

（SecondFragment.this、jrizal_trivia.class）; エラーが表示されます。 「私はここSecondFragmentの私のボタンに別のアクティビティを呼び出したい。おかげ

Answer 1

i = new Intent(SecondFragment.this, jrizal_trivia.class); 

？「（com.hci.acer.heroesunite.SecondFragment、java.lang.Classの）

ヘルプ誰をconstructor'intentを解決できません

最初のparamあなたはgetActivity()/getContext()によってフラグメントからContextを得ることができるので、Contextが必要

ので、このようにする必要があります：。

i = new Intent(getActivity(), jrizal_trivia.class);